Yes, but there is still a huge amount of evidence to go through. Remember DNA evidence is still relatively new in the grand scale of things.
On the plus side they have the texts between the two, the 'perfectly timed' visit to SH's Mum's. The buying of all the 'clean-up' products and NM buying the saw. The searching of 'hiding a body' on the phone. And we have only heard from a couple of witnesses so far too. We don't yet know what other lies will come out or what other evidence will be brought in. Maybe I am being over confident but there are still 4 more weeks to go. Remember, the CPS would have heard what evidence there was beforehand and worked out whether there was a good chance of conviction on both of them.
On the otherhand IF SH gets off on all charges I would be stunned! May Justice be done for Becky!